Joint compound should be checked over first.
Recoat any sunk in or nicked spots.
Sand off any ridges with 120 grit paper or a sanding block
Putty is rubbed on flush and does not need to be sanded
Use dust brush and broom to get the room some- what clean Use a shop vac if available .
The room will be dusted again before the finish coats are applied Prime ceiling & walls Begin cutting in at the top.
Use a 2.5inch angular sash brush.
Paint a strip 3 or 4 inches wide.
A latex wallboard primer or latex primer sealer is usually preferred